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The development of information technology has driven significant transformations in human resource (HR) management, including in the aspects of compensation and job description adjustments. Digitalization in HR management not only simplifies administrative processes but also has the potential to increase employee satisfaction and loyalty through transparency, speed, and ease of access to information. This study aims to analyze the effect of digital compensation and job description adaptation on employee loyalty at AK-Tekstil Solo, a labor-intensive company in the textile industry. The research method uses a quantitative approach with a survey design. Data were collected through questionnaires distributed to a number of employees as respondents, then analyzed using multiple regression analysis techniques to test the effect of independent variables on the dependent variable. Digital compensation in this study was measured by aspects of transparency, payment speed, and ease of access, while job description adaptation was assessed by role clarity, task flexibility, and communication between management and employees. The results show that digital compensation designed with a transparent, accurate, and easily accessible system contributes positively to job satisfaction, which in turn increases employee loyalty to the company. Similarly, job description adaptation carried out in a structured manner and accompanied by clear communication has been proven to strengthen employee commitment and attachment to the organization. These findings provide strategic implications for company management, particularly in labor-intensive industries, to develop digital-based compensation systems that are not only efficient but also foster trust and fairness. Furthermore, management needs to ensure job descriptions are adaptive to changes in the work environment so that employees continue to feel valued and relevant to the company's goals. Implementing this strategy is expected to create a stable, productive, and sustainable work environment.  

Natural resource management in Paccellekang Village, which includes rice paddies, plantations, and teak trees, remains suboptimal despite its significant potential, particularly the abundant wood waste. This wood waste largely originates from agricultural activities, plantations, and small-scale wood processing. Currently, this waste is often simply burned or dumped, potentially polluting the environment and causing air pollution. However, if managed properly, wood waste can be transformed into high-value products that can provide financial benefits to the community. This community service activity aims to empower farmer groups through training in processing wood waste into marketable products such as charcoal, liquid smoke, and wood flour. These products not only have economic value but are also useful in various sectors, for example, liquid smoke as a natural preservative, charcoal as an environmentally friendly fuel, and wood flour as an industrial raw material. The program implementation method uses a structured approach that includes initial observations to identify potential partners and needs, outreach to provide a comprehensive understanding of the program's objectives, and training in wood waste processing technology. Furthermore, intensive mentoring and evaluation of implementation results are provided to ensure program sustainability. The results demonstrated that the farmer group members understood the concept of productive wood waste management and demonstrated high enthusiasm for developing innovative products. This program successfully improved the community's skills in utilizing local resources while reducing the negative impact of waste on the environment. Thus, this activity contributed to increasing community income and supporting sustainable economic development in Paccellekang Village.

This study aims to determine the effect of promotion, price, and brand image on consumer purchasing decisions in the Cap Fajar Chips Home Industry. The study uses a quantitative approach with a survey method. The study population is consumers who have made purchases at the store, with a total of 150 respondents selected as a sample. The data collection method is carried out through distributing questionnaires, then the data is analyzed using multiple linear regression techniques to test the effect of each independent variable, both partially and simultaneously, on purchasing decisions. The results of the analysis show that the promotion variable (X1) does not have a partial significant effect on purchasing decisions, as evidenced by a significance value of 0.502 (> 0.05). This indicates that the intensity or form of promotion carried out is not enough to directly influence consumer purchasing decisions. In contrast to promotions, the price variable (X2) is proven to have a positive and significant effect on purchasing decisions. A significance value of 0.000 (< 0.05) indicates that competitive and affordable pricing is an important factor that encourages consumers to choose Cap Fajar chips products. Similarly, the brand image variable (X3) has a partial significant influence on purchasing decisions, with a significance value of 0.013 (<0.05). This indicates that consumers' positive perceptions of brand reputation and quality can strengthen the desire to purchase. Simultaneously, the three variables—promotion, price, and brand image—have a significant influence on consumer purchasing decisions. This finding is evidenced by a significance value of 0.001 (<0.05). Based on the results of the study, it can be concluded that price and brand image are the dominant elements that determine purchasing decisions for Cap Fajar chips, while promotions require a more effective strategy to provide a real impact.

Revolusi Industri 4.0 mendorong lahirnya Pendidikan 4.0 yang terintegrasi dengan teknologi digital. Perubahan ini berdampak signifikan pada seluruh sistem pendidikan, termasuk Pendidikan Agama Kristen (PAK). PAK memiliki mandat unik, yaitu membentuk manusia seutuhnya berdasarkan nilai-nilai Alkitab, sehingga harus responsif terhadap perkembangan teknologi tanpa kehilangan integritas teologisnya. Tantangan utama terletak pada keterbatasan kompetensi guru dalam mengintegrasikan teknologi dengan pendekatan pembelajaran yang relevan. Dalam konteks ini, pembelajaran adaptif muncul sebagai strategi pedagogis yang menyesuaikan metode, materi, dan tempo dengan karakteristik peserta didik. Melalui pembelajaran adaptif, guru PAK dapat memanfaatkan teknologi untuk menciptakan pengalaman belajar yang kontekstual, personal, dan bermakna.Penelitian ini menggunakan pendekatan kualitatif deskriptif dengan metode studi pustaka, mengkaji literatur terkini terkait PAK, pembelajaran adaptif, dan teknologi pendidikan. Hasil kajian menunjukkan bahwa integrasi pembelajaran adaptif dan teknologi dalam PAK mampu menjawab tantangan Pendidikan 4.0 dengan memfasilitasi diferensiasi pengajaran, penilaian formatif, dan kolaborasi lintas pihak. Teknologi berperan sebagai medium strategis untuk menyampaikan nilai iman dengan cara yang kreatif dan relevan, sementara pembelajaran adaptif memastikan relevansi materi sesuai kebutuhan peserta didik yang beragam.Kesimpulannya, PAK adaptif berbasis teknologi bukan hanya alternatif metodologis, tetapi strategi strategis yang harus dikembangkan secara berkelanjutan. Dengan dukungan kompetensi guru, infrastruktur teknologi, serta sinergi antara sekolah, gereja, dan keluarga, PAK dapat menjadi sarana pembentukan generasi Kristen yang matang secara intelektual, spiritual, dan moral di tengah dinamika global abad ke-21.

This research explores the engineering and performance evaluation of 17-4 PH stainless steel as a potential material for turbine blades in geothermal power plants (PLTP). To promote renewable energy innovation in industrial engineering, this study focuses on improving material reliability through microstructural optimization and mechanical property control. The material was produced using the investment casting method at PT SPVMB and then subjected to four heat treatment variations: H900, H1025, AVG (average), and as-cast conditions, with reference to ASTM A747 standards. Mechanical and corrosion characterization were performed through hardness and tensile tests, electrochemical corrosion analysis using geothermal water from the Dieng PLTP, and microstructural observation using an optical microscope. The results showed that the H900 condition had the highest hardness and yield strength (48.46 HRC and 939.25 MPa), but its corrosion rate was relatively high. In contrast, the H1025 heat treatment provides balanced mechanical strength (43.88 HRC and 860.91 MPa) with the lowest corrosion rate (0.027 mm/year), supported by a uniform tempered martensite structure. These findings indicate that heat treatment optimization significantly improves the suitability of 17-4 PH stainless steel for sustainable geothermal applications. The H1025 condition meets all the requirements for geothermal turbine blades, including hardness, strength, and corrosion resistance, potentially extending component life and reducing maintenance costs. Furthermore, the results of this study strengthen the agenda for developing durable, environmentally friendly materials to support renewable energy systems. This study also provides practical insights for industry in selecting the optimal heat treatment that combines mechanical performance and corrosion resistance in extreme geothermal environments.

This study aims to analyze the differences in various extraction techniques and their relationship to the yield and biological activity of phytochemical compounds from natural materials. The research was conducted through a systematic literature review from various reliable scientific sources over the last decade. The results indicate that extraction methods such as maceration, soxhlet extraction, microwave-assisted extraction (MAE), and ultrasound-assisted extraction (UAE) have varying effectiveness. The effectiveness of these methods is highly dependent on the type of material, solvent used, and process parameters such as temperature, time, and solvent-to-material ratio. Modern extraction methods such as sonication, MAE, and UAE tend to produce higher yields and better biological activity. These modern methods have the advantage of being more time-efficient and requiring fewer solvents, thus allowing the extraction of active compounds more optimally. Additionally, technologies like microwave and ultrasonic waves help break down the cell walls of natural materials, enhancing the release of phytochemical compounds more effectively and rapidly. However, conventional methods such as maceration and soxhlet extraction remain relevant, especially for materials containing thermolabile compounds that may degrade at high temperatures. These methods are still preferred to maintain the stability of active compounds sensitive to thermal degradation. Choosing the appropriate extraction method is crucial in producing high-quality extracts that can potentially be used as raw materials for phytopharmaceuticals, supplements, or other natural products. This study provides a strong theoretical foundation for further experimental research and guidance in selecting extraction methods based on the required efficiency and effectiveness for industrial applications. Thus, this study contributes to the development of more efficient and high-quality natural products.

This study aims to analyze the influence of Accounting Conservatism, Corporate Governance, and Financial Distress on Tax Aggressiveness in non-cyclical consumer sector companies listed on the Indonesia Stock Exchange (IDX) during the period 2019 to 2023. This study uses a quantitative approach with secondary data in the form of annual financial reports of sample companies. Sampling was carried out using a purposive sampling technique, resulting in 14 companies that met the research criteria with a total of 70 observations over five years. The analysis method used is panel data regression, and testing was conducted using E-Views 12 software. The main objective of this study is to determine the extent to which conservatism practices in financial reporting, corporate governance, and the company's financial condition (in the context of financial distress) can influence the company's tendency to engage in tax aggressiveness, namely efforts to minimize the tax burden legally but aggressively. The results of the study indicate that simultaneously, the three independent variables—accounting conservatism, corporate governance, and financial distress—have a significant influence on tax aggressiveness. However, only corporate governance (as proxied by institutional ownership) and financial distress were found to have a significant influence on tax aggressiveness. In contrast, accounting conservatism and corporate governance, as proxied by managerial ownership, did not show a significant influence. These findings suggest that companies with high institutional ownership tend to be better able to control aggressive tax management practices, while financial distress encourages management to seek tax efficiency measures as a survival strategy. This research contributes to the interests of regulators and stakeholders in understanding the factors influencing tax aggressiveness in vital industrial sectors such as non-cyclical consumer goods.

This study was conducted at Family Pharmacy in Pekanbaru City with the objective of examining the relationship between emotional intelligence and work stress, as well as their combined effect on employee performance. The research population consisted of all 150 employees in the production department. Using the Slovin formula, a sample of 60 respondents was selected through accidental sampling. Data collection was carried out via an online questionnaire distributed through Google Forms. The analytical methods employed were correlation analysis to assess the relationship between variables and multiple linear regression to measure their simultaneous influence on performance. The results indicated a negative relationship between emotional intelligence and work stress, meaning that employees with higher emotional intelligence tended to experience lower levels of work stress. Furthermore, when examined together, emotional intelligence and work stress had a significant impact on employee performance. Specifically, these two variables contributed 47.4% to the variance in performance, while the remaining 52.6% was influenced by other factors not addressed in this study. The findings highlight the importance of emotional intelligence as a critical factor in managing workplace stress and enhancing performance, especially in the pharmaceutical industry where precision, cooperation, and adaptability are essential. Improving employees’ emotional intelligence may serve as a strategic approach to reducing work-related stress and fostering better performance outcomes. Organizations are therefore encouraged to invest in training and development programs that emphasize emotional regulation, empathy, interpersonal skills, and effective communication. Future research should consider incorporating additional variables such as work motivation, organizational culture, leadership style, and job satisfaction to gain a more comprehensive understanding of the determinants of employee performance. Expanding the research scope to different departments and industries could also provide broader insights into how emotional intelligence and work stress interact across diverse work settings.

The purpose of this study is to assess the financial performance of PT Mayora Indah Tbk. through an analysis of profitability and liquidity ratios over the past five years. A company's financial performance is a key indicator in evaluating operational success, managerial efficiency, and overall financial health. This assessment is important for investors, management, and other stakeholders in strategic decision-making. This study uses a quantitative descriptive approach with a case study as its primary method. The data analyzed are secondary data in the form of PT Mayora Indah Tbk.'s annual financial reports published on the Indonesia Stock Exchange. The ratios analyzed include Return on Assets (ROA), Return on Equity (ROE), Net Profit Margin (NPM) as profitability indicators, and Current Ratio (CR), Quick Ratio (QR), and Cash Ratio as liquidity indicators. The results of the study indicate that in general, the company is able to maintain a stable level of profitability, despite minor fluctuations from year to year. ROA and ROE indicate that management is quite effective in managing assets and equity to generate profits. NPM also shows a competitive net profit margin compared to similar industries. Meanwhile, the liquidity ratio indicates that PT Mayora Indah Tbk. has a strong and consistent ability to meet its short-term obligations. The CR, QR, and Cash Ratio are all within safe limits, indicating healthy liquidity. In conclusion, PT Mayora Indah Tbk. demonstrates good financial performance in terms of both profitability and liquidity, making it a company worthy of consideration for long-term investment.

The Geothermal Power Plant (PLTP) project in Batukuwung Village, Padarincang District, Serang Regency, has raised concerns among the community about the threat of environmental damage and disruption of the sustainability of the local agricultural system. So far, the community has depended on traditional agriculture that is closely tied to local social, cultural, and ecological values. PLTP projects, which are framed as part of the clean energy transition, actually create tensions between development and environmental conservation. This research aims to examine the social and ecological impact of the PLTP project on the lives of the village community. The method used is a qualitative approach with case studies. Data were collected through purposive sampling techniques for in-depth interviews with affected residents, community leaders, and environmental activists, as well as analysis of online media content and policy documents. The results of the study show that the presence of the project has created ecological and social vulnerability. Disruption to access to clean water, degradation of soil quality, and disruption of agricultural ecosystems are serious threats. In addition, the space for public participation in the project-related decision-making process is very limited, thus triggering resistance and horizontal conflicts. These findings show that the clean energy narrative does not always align with the reality on the ground. Therefore, it is important to consider the principles of ecological justice and the sovereignty of local communities in any energy development policy. This study recommends participatory dialogue and a thorough environmental evaluation before the project proceeds, so that development does not compromise the right of life of local communities and the ecological sustainability of the region. The active involvement of citizens as subjects, not objects of development, is the key to creating sustainable and equitable solutions for all affected parties.

Silicotuberculosis is a complex lung disease, a combination of silicosis and tuberculosis (TB). Silicosis is a disease caused by the inhalation of silica particles, which can lead to pulmonary fibrosis, while TB is an infectious disease caused by Mycobacterium tuberculosis. Long-term exposure to silica dust can cause silicosis and also increase the risk of TB infection, especially in countries with a high TB burden. Workers exposed to silica dust in the mining, construction, and manufacturing industries are among the groups most at risk. The diagnosis of silicotuberculosis is often difficult because the clinical and radiological symptoms of the two diseases often overlap. Symptoms, such as chronic cough, shortness of breath, and chest pain, can be very similar in silicosis and TB, often delaying a correct diagnosis. The pathophysiology of silicotuberculosis involves impaired function of macrophages, immune cells that play a role in fighting infection, and a compromised immune response due to silica exposure. These disruptions facilitate the progression of TB infection, further worsening the patient's health. Primary management of silicotuberculosis includes controlling TB infection with standard anti-tuberculosis drug therapy (OTT) and preventing silica exposure. Preventing occupational exposure to silica dust is crucial to reducing the risk of developing the disease. The prognosis of the disease is greatly influenced by the severity of pulmonary fibrosis and delay in diagnosis. The more severe the fibrosis, the worse the prognosis. Therefore, preventing silica dust exposure, along with routine TB screening for high-risk workers, is crucial to reducing the incidence of silicotuberculosis. Furthermore, education about the risks of the disease is crucial to raise awareness among workers and the general public.

The potential war between India and Pakistan poses significant risks to the Indonesian economy, as it is expected to exacerbate uncertainty in the global financial market. Such geopolitical tensions often trigger a ‘flight to safety,’ where capital flows shift to countries considered stable, leading to reduced foreign direct investment (FDI) in emerging markets like Indonesia. This scenario is likely to place additional pressure on Indonesia’s exchange rate, further destabilizing its financial position. One of the key impacts of the looming India-Pakistan war on Indonesia is its effect on monetary and fiscal management. The Indonesian government is already facing significant challenges, including managing a large amount of maturing debt and grappling with a growing budget deficit. The war would complicate these efforts, making it more difficult for the government to stabilize the economy and implement effective policies. Indonesia’s export sector will also be affected, as India and Pakistan are two of the country’s main trading partners, especially for key commodities like crude palm oil (CPO) and coal. India is Indonesia’s 4th largest export destination, accounting for approximately 9% of total exports, while Pakistan represents around 1.9%. Any disruption in trade with these countries, due to the war or political instability, could significantly hurt Indonesia’s export revenues and negatively affect industries reliant on these markets. Moreover, Indonesia is already facing challenges from the United States, which has imposed reciprocal tariffs worth 32% on Indonesian products. This trade tension, combined with the geopolitical instability from the India-Pakistan conflict, will add further strain to Indonesia’s trade balance. The combination of these factors could lead to slower economic growth, reduced investor confidence, and potentially higher inflation, as the country faces multiple external and internal economic pressures.

This study examines the efficiency of assets in the Indonesian manufacturing industry sector in obtaining sales, particularly in the post-pandemic era. Despite the growing enthusiasm of both domestic and foreign investors in the sector, there has been an increase in layoffs (PHK), which poses a paradoxical situation. On one hand, investors are showing interest in the manufacturing industry, while on the other hand, there is an unfortunate rise in the number of employees being laid off. This contradiction sparks interest in analyzing the efficiency with which manufacturing companies utilize their assets to generate sales. The research uses secondary data from the Indonesia Stock Exchange (IDX) from 2021 to 2023, focusing on the manufacturing industry. The analysis employs financial ratio analysis, specifically the Total Asset Turnover ratio, to assess asset utilization. The findings show that the Total Asset Turnover ratio is 0.94X, which is below the industry standard of 1.1X (0.94 < 1.1). This indicates that the asset efficiency in obtaining sales is relatively low. The results suggest that manufacturing companies should evaluate and revise their policies to ensure that their assets are utilized more effectively. By designing accurate and targeted sales strategies, companies can improve their asset turnover and optimize their operations. This research highlights the importance of evaluating asset efficiency in the context of sales generation, especially in a sector experiencing contrasting dynamics between investor enthusiasm and rising layoffs. It emphasizes that strategic planning and policy adjustments are crucial for manufacturing companies to achieve better outcomes in terms of asset utilization and sales performance.

Small and medium-sized enterprises (SMEs) play a strategic role in national economic development, particularly in rural areas. Their existence not only supports local economic growth but also contributes to cultural preservation. One concrete example is the Balinese kamen embroidery convection industry that is developing in Kates Village, Kauman District, Tulungagung Regency. This industry not only produces products that represent local cultural identity but also serves as a primary source of livelihood for a large portion of the local community. This study aims to examine the role and impact of this embroidery convection industry on improving the economic conditions of the Kates Village community. The study used a descriptive qualitative approach with a field study method, where data were collected through direct observation techniques, in-depth interviews with village officials, convection business owners, workers, and local residents, as well as documentation related to production activities. The results show that this industry is able to absorb a significant local workforce, both among women and youth, thereby reducing unemployment. Furthermore, community incomes have increased, directly impacting families' living standards. Furthermore, the existence of this industry has also encouraged the growth of new entrepreneurs, both in the convection sector and other supporting sectors such as distribution and marketing. Overall, the Balinese kamen embroidery convection industry in Kates Village has proven to be a local economic force based on culture. Its potential to strengthen the people's economy is enormous, especially if developed in a targeted and sustainable manner through policy support and capacity building of business actors. Therefore, greater attention from the government and other stakeholders is needed to ensure this industry continues to grow and provides long-term positive impacts for the community.

Mekarsari Village, located in Panimbang District, Pandeglang Regency, Banten Province, has local potential in the form of a bamboo-based home industry. This potential has long been part of the cultural and economic identity of the local community. Therefore, the goal of this Community Service (PKM) activity is to increase the income of bamboo craftsmen by encouraging innovation, improving product quality, and broader marketing strategies. The PKM activity was carried out by male and female students of KKM Universitas Bina Bangsa, group 41 of 2025. The stages of activities carried out in this program include three main phases. The pre-implementation stage was carried out through a process of observation and direct visits to the homes of bamboo craftsmen in Sumur Kuya Village, Mekarsari Village. Students conducted short interviews to explore obstacles and potential in production activities carried out so far. The implementation stage included practical work on making household products such as winnowing baskets, food covers, tissue holders, and bamboo baskets by KKM41 participants, guided directly by the craftsmen. Students also provided light training on product design to make it more attractive and competitive in the market. The final stage, the evaluation stage, was conducted through product socialization activities to the local community, including mini-exhibitions and open discussions. The community was educated on the importance of preserving local heritage while remaining open to innovation in production and marketing. This activity was held from July 18–20, 2025. The methods used included observation, field surveys, interviews, and hands-on practice. Bamboo was chosen as the basic material because it is abundant in the surrounding environment, as well as its advantages as an environmentally friendly material with high aesthetic value.

The Printed Circuit Board (PCB) industry increasingly relies on automation and digitalization to improve efficiency and accuracy in production and distribution processes. One common practice is the use of labels containing product information in the form of barcodes or QR codes, which allow automatic data input and reduce the risk of human error compared to manual writing. However, in current practices, these labels are only attached to PCBs after they have been placed inside casings. This creates a significant limitation, as access to the label information requires disassembling the casing whenever product verification, tracking, or troubleshooting is needed. Such a process not only consumes additional time and resources but also increases the risk of damaging the product. To overcome this challenge, this study proposes the development of a traceability system designed to accurately monitor the location, identity, and status of PCBs throughout the distribution process. The system was implemented as a web-based application capable of generating and printing product information labels in the form of barcodes and QR codes. Each label functions as a unique identifier, ensuring that every PCB can be distinctly tracked from production to final product assembly. All data associated with the labels is automatically stored in a centralized database, providing real-time accessibility, simplifying information management, and enabling faster decision-making in the event of quality control issues. System evaluation was carried out through rigorous testing, which showed a 100% success rate in generating, storing, and retrieving product information without errors. The findings indicate that the proposed traceability system is both effective and efficient, and it offers a practical solution for industries seeking to enhance supply chain visibility, improve product accountability, and reduce operational inefficiencies in PCB distribution and lifecycle management.

Fatigue is a critical issue in labour-intensive small industries, especially in traditional food production such as tofu manufacturing. This study aims to develop a fatigue classification model using a decision tree algorithm by integrating subjective assessments of the work system through the Macroergonomic Organizational Questionnaire Survey (MOQS) and objective physiological indicators, specifically Cardiovascular Load (CVL). The research was conducted in a tofu home industry located in Kalisari Village, Banyumas, Indonesia. Primary data were collected from 10 workers through MOQS questionnaires and heart rate measurements taken at rest and during work. CVL values were calculated and used as labels for classification into three categories: low, moderate, and high fatigue. Meanwhile, MOQS dimension scores (organization, job, personal, environment, and technology) were transformed into interval data and used as classification features. A decision tree model was built using the CART algorithm and visualized for interpretability. The results show that all workers experienced at least moderate fatigue, with 20% categorized as high fatigue. The decision tree revealed that the dimensions of organizational and personal factors were the most influential in predicting fatigue levels. The model provides a practical and interpretable tool to support decision-making in scheduling, workload balancing, and ergonomic interventions. This study demonstrates a novel approach to combining macroergonomic assessments and physiological data with machine learning for practical fatigue risk management in small-scale food production environments.

Classification codes are an important instrument in the management and storage of archives, serving as a guide to facilitate the retrieval of archives quickly, precisely, and accurately. Classification codes can be letters, numbers, or a combination of both. At the Surabaya Industrial Training Center (BDI), a classification code system has been applied in the filing process. However, as the volume of archives increases every year, there has never been a thorough evaluation to ensure their suitability with the development of existing types of archives and the demands of modern administration. This study aims to evaluate the effectiveness of the classification codes used in BDI Surabaya, especially in supporting the process of rediscovery of archives. The research method used is a descriptive method with data collection techniques through observation, interviews, and field documentation conducted for three months. The results of the study show that the classification code structure at BDI Surabaya is adequate to the tertiary level and facilitates the process of rediscovering old archives. However, the existing system has not accommodated some new types of archives, such as student internship archives and business incubator archives. This classification gap results in delays and inaccuracies in the grouping of archives. In addition, the increase in the average archive volume of 34.7% per year further emphasizes the urgency of updating the classification system to be in line with the development of organizational needs. In conclusion, it is necessary to improve the classification code by adding the PP.03.19 subcode for student internship archives and DL.16 code for business incubator archives. It is also necessary to prepare new SOPs, update the archive list format, and train archivists to improve the effectiveness of archive management.

This study aims to extract and purify secondary metabolite compounds from Coffea arabica leaves using various separation techniques, such as maceration, column chromatography, thin layer chromatography (KLT), and preparatory KLT, and followed by flavonoid content analysis using UV-Vis spectrophotometry. The process begins with drying the arabica coffee leaves, then extraction is carried out using 96% ethanol for three days. After that, the solvent is evaporated with a rotary evaporator at 60°C to obtain a viscous extract. The extracts were further separated using column chromatography with a mixed solvent of n-hexane: ethyl acetate (3:1), resulting in 12 fractions that showed color differences, which was an indication of the diversity of the compounds in the extract. Advanced identification was carried out with KLT using methanol solvents: chloroform (9:1) at UV wavelengths of 254 nm and 366 nm, indicating the presence of compounds with medium to high polarity. Furthermore, the isolated compounds were further separated using the preparative KLT (KLTP) method. To determine the flavonoid content, UV-Vis spectrophotometry was performed at a wavelength of 431 nm, using quercetin as standard. The results of the analysis showed that Arabica coffee leaf extract had a yield of 7.35% and a total flavonoid content of 19.0605 mgQE/g. These findings show that arabica coffee leaves are a source of flavonoid compounds that have the potential for the development of herbal or phytopharmaceutical products. The flavonoid content found may provide health benefits, particularly in increasing antioxidant activity, which can be used in the treatment of oxidative stress-related diseases. The results of this study also open up opportunities for the development of plant-based products, especially Arabica coffee, in the pharmaceutical and cosmetic industries as an efficacious natural active ingredient.

Tempoyak is a traditional fermented product made from durian and widely consumed in Sumatra. Tempoyak fermentation involves lactic acid bacteria (LAB), which are known to have potential as probiotics and as producers of antioxidant compounds. The tempoyak fermentation process plays an important role in increasing nutritional value and health benefits, primarily due to its ability to produce bioactive compounds such as lactic acid and antioxidants that are beneficial for the human body. This study aims to isolate lactic acid bacteria from local fermented tempoyak from Sumatra and evaluate their potential antioxidant activity. Isolation was carried out using the spread method on MRS agar media, which is specifically designed to support the growth of lactic acid bacteria. Next, the obtained isolates were analyzed based on colony morphology, Gram staining, and catalase test for initial identification of the types of bacteria present in tempoyak. After isolation, selected isolates were tested for antioxidant activity using the DPPH test, which is one method to measure the ability of a compound to neutralize free radicals. Vitamin C was used as a positive control in this test. The results showed that several LAB isolates from tempoyak had varying antioxidant activity, with some isolates showing significant potential. The detected antioxidant activity indicates that LAB isolates from tempoyak have the potential to be applied as probiotics with health benefits and as functional food ingredients that can help prevent cell damage caused by free radicals. This study provides evidence that tempoyak, besides being a traditional food, also has the potential to be further developed in the functional food and probiotic industries. These findings add insight into the potential of traditional fermented products, such as tempoyak, which provide not only culinary benefits but also health benefits.